The is the headquarters of the
Aikikai which is an
umbrella organisation of various national, as well as smaller,
aikido organisations. Although the name strictly refers only to the main training hall (
dojo), it is often used by extension to refer to the Aikikai organisation itself. The dojo was founded by
Morihei Ueshiba in
1931 under the name Kobukan. The current building, which stands on the same site as the original Kobukan, dates from 1967.
See more at Wikipedia.org...